Our roof rafter calculator tools are handy for calculating the number of rafters needed, rafter length calculator, lineal feet of rafter, board feed in ridge and sub-facia,and the total board feet in the roof.. Calculate the length of common rafters with this free and easy online tool by entering a dimension for the roof width, selecting a pitch for the roof, and the thickness of the ridge.. New house construction and room additions call for installation of new roof rafters. unlike rafters for flat roofs, rafters for pitched gable and hip roofs rise at an angle from the outside walls and meet at a ridge..
Pitch break shed roof rafter length. rafter tools+ is a rafter calculator for complex roof framing angles that other roof framing calculators don't offer.. This dormer shed roof calculator will return roof framing trigonometry & geometry details for: dormer shed roof rafter length; dormer shed roof miter angle. The roof pitch calculator calculates slope, pitch, angle and rafter lengths, based on input of rise (m) and run (r). use the diagrams on this page as a reference when inputting rise and run, and while interpreting the calculated results. angle - the angle of a roof is the same as the roof's slope.
